Just before meiosis I there is Interphase I where there is DNA replication, organelle synthesis and an increase in energy stores. Then: Prophase I - Chromatin condenses into chromosomes and there is crossing over of non-sister chromatids, the nuclear membrane disappears, centrioles replicate and move to either pole of the cell. Metaphase I - the pairs of homologous chromosomes move to centre of cell - there is independent assortment. They are held in the centre of the cell by the spindle fibres which are made by the centrioles. Anaphase I - chromosomes are pulled to either pole as spindle fibres contract. The spindle fibres areattached to the centromeres of the chromosomes. Telophase I - the chromosomes reach either pole of the cell, and then there is cytokinesis and cell starts to divide. Prophase II - there is again the disappearance of the nuclear membrane and centrioles move to either pole. Metaphase II - the chromatids line up along equator of cell - again there is independent assortment Anaphase II - the chromatids are pulled to either pole as spindle fibres contract. Telophase II - the chromatids reach either pole, nuclear membrane reforms, and nucleolus reappears. Meiosis is completed! Those are all the stages of meiosis.
Meiosis 1: Prophase 1, Metaphase1, Anaphase 1, Telophase 1. Meiosis 2: Prophase 1, Metaphase 2, Anaphase 2, Telophase 2. Makes 4 daughter cells that contain 4 chromosomes each.
Anaphase of Meiosis 1 separates the homologous chromosome pairs, but during Anaphase of Meiosis 2, the sister chromatids are separated instead. Also, Meiosis 1 starts with one diploid cell and ends with 2 haploid cells, whereas Meiosis 2 starts with the 2 haploid cells and ends with 4 haploid cells (gametes).
Metaphase of meiosis 2 has the haploid number of chromosomes at the equator of the spindle. In meiosis 1, during metaphase, there are still pairs of homologous chromosomes lined up at the equator.
DNA is copied
Meiosis 2
Meiosis 1 and Meiosis 2
Meiosis 1 and Meiosis 2
DNA is copied in meiosis 1.
Meiosis I and meiosis II
DNA is copied in meiosis 1.
The products of meiosis 1 are two haploid daughter cells with duplicated chromosomes, while the products of meiosis 2 are four haploid daughter cells with unduplicated chromosomes. Meiosis 1 separates homologous chromosomes, while meiosis 2 separates sister chromatids.
Meiosis 1: Prophase 1, Metaphase1, Anaphase 1, Telophase 1. Meiosis 2: Prophase 1, Metaphase 2, Anaphase 2, Telophase 2. Makes 4 daughter cells that contain 4 chromosomes each.
No, the nucleus does not divide in meiosis 1 and then again in meiosis 2. In meiosis 1, the nucleus divides once to reduce the chromosome number in the cell, resulting in two daughter cells. In meiosis 2, the two daughter cells from meiosis 1 divide again to form a total of four haploid daughter cells.
2 and 4
Anaphase of Meiosis 1 separates the homologous chromosome pairs, but during Anaphase of Meiosis 2, the sister chromatids are separated instead. Also, Meiosis 1 starts with one diploid cell and ends with 2 haploid cells, whereas Meiosis 2 starts with the 2 haploid cells and ends with 4 haploid cells (gametes).
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The steps to Meiosis are ;~ Prophase 1~ Metaphase 1~ Anaphase 1~ Telephase 1~ Prophase 2~ Metaphase 2~ Anaphase 2~ Telephase 2